Coating device



May 24, 1938. s. F. WRAAL 2,118,719

v COATING DEVICE Filed Jill 7, 19s? I s Sheets-sheaf 1 ar -w e 'P Z5 -24 2 181 s. F. WRAAL comma DEVICE Filed July 7, 1937 3 Sheets-Sheet 2 May 24, 1938. s. F. WRAAL COATING DEVI E Filed July 7, 19:57

3 Sh 'eetseShee t s Patented May 24, 1938 PATENT ounce COATING DEVICE Sverre Frithjoi' Wraal, London, England, assignor to Ardecor (Products) Limited, London, England Application July '1, 1937, Serial No, 152,408 In Great Britain April 19, 193':

10 Claims.

This invention relatesto devices for applying paint, distemper and the like to fiat surfaces such as walls, of the kind comprising a portable appliance in which a printing roller or colour transferring roller is adapted to be moved up and down or across the surface to which the paint or distemper is to be applied. Such a device has comprised a hollow container-containing one or more colours in troughs and rollers by which the colour is transferred to the roller which is in contact with the wall, and the colours, when more than one is used, are adapted to be applied in stripe-form, the edges of the two contrasting colours being toned down so as to merge one into the other.

The object of the present invention is an improved appliance of this kind in which better means are provided by which the contrasting colours will be merged one into the other, the arrangement permitting of two or more colours to be simultaneously applied.

In carrying the invention into efiect with an apparatus for applying two colours, the hollow casing is provided at its lower part with two troughs adapted to contain the two colours that are chosen and these troughs may be replenished from time to time by means of ducts or channels leading from the exterior of the appliance to the respective trough.

In order to transfer the colours or the colour or distemper in each trough, a roller is immersed in each and the surface of such rollers is provided with a number of small projecting points or protuberances by which the colour transferring action of the rollers may be facilitated to other rollers as will be described.

Rotating in contact with these rollers in the respective troughs are two other rollers which are made of special form, that is to say,- the roller receiving the colour from one trough is provided at its relatively opposite ends with a series of upstanding ridges of circumferential form, and the width of the respective ridges is progressively narrowed from the extreme end.

There are a number of these progressive continuous ridges which become narrower as they approach the centre of the roller and such ridges are continued as smaller ridges which are broken or interrupted by means of gaps formed therein and such gaps are relatively displaced over the respective ridges.

The construction of such roller causes, therefore, the roller to pick up a quantity of colour at each end and this quantity of colour progres- (Cl. ill-62.6)

sively decreases as it approaches the centre of the roller. 1

The other roller which is designed to receive colour from the second trough is constructed with a similar series of upstanding circumferen- 5 tial ridges which are relatively displaced from the ridges in the first-mentioned roller, thatis to say, the centre portion of this second colour receiving roller has its widest ridges at or near the centre. These ridges are progressively diminished in thickness as they approach the extremities of the roller and finally end in two or more rows of ridges which are gapped or interrupted in a manner similar to that of. the flrst-mentionedrollen. The colour, therefore, received on this second roller is of such a character that it is mainly concentrated on the centre portion of the roller and becomes less outwards. Thus, comparing the two colour receiving rollers thefirst one will receive the greater quantity of 20 colour towards its ends whilst in the other roller the greater amount of colour will be concentrated on the centre portion of the roller.

. .With the colours thus distributed on the two rollers and preferably of contrasting efiect, there 25 is arranged above the two rollers and riding in contact with their peripheries a colour combining roller and this roller rides in contact with the raised circumferential ridges on the colour receiving rollers and is rotated by contact therewith, by which the combining roller receives one colour principally on the middle of the roller whilst the two outer portions of the combining roller receive the colour from the ends of the other colour receiving roller. These two preferably contrasting colours are caused to merge one into the other by the relatively narrower and interrupted ridges with which the two colour receiving rollers are provided and such combining. roller rotates in contact with a still further roller which may be termed the colour applying roller. This colour applying roller has preferably a relatively soft felt-like coating which has the efiect of smoothing out the colours and causing them to be merged or toned into one another to prevent any sharply defined edges. It will be evident that this colour applying roller will either be made as a continuous cylindrical periphery, or it may be broken up into a series of circumferential sections, or divided parallel to the axle.

From the above it will be appreciated that the colour applying roller will rest against the surface to which the colour is to be applied and the casing is such that as it is worked up and down be applied by the soft applying roller described.

The casing is fitted with suitable projecting guide rollers in addition to the colour applying rollers so that the proper traverse over the wall is facilitated and for this purpose the device or casing may be provided with a suitable handle at its rear. Moreover, the rear of the casing may be provided with a horizontal spirit level. The operator may by sight keep this horizontal and he will then know that the up and down movements of the device will be vertical.

Referring to the accompanying drawings which illustrate by way of example a device made in accordance with the invention:-

Figure '1 shows the device in elevation from the rear.

Figure 2 shows a sectional view of the device on line 2-2 of Figure 1.

Figure 3 shows the device in elevation from the front.

Figures 4 and 4a show in elevation the ridged rollers employed in the device.

In these figures (1 to 3) l represents the casing, preferably of metal, provided with a handle 2.

As shown in Figure 2 the casing is divided longitudinally by means of a partition 3 into two colour compartments 4 and 5 each of'which is provided with a spout 6 at the back of the device enabling the colour to be introduced into the respective compartments. The spout of the front compartment is provided with a tubular passageway 1 enabling the colour to be conducted through the rear compartment 5 to the front compart ment 4.

Within the casing l two sets of rollers 8, 9, and I0, II respectively are provided, 8 and Ill bearing on the lower ends of guideways l2 and I3 respectively, which guideways are provided at each end of the casing l. The upper rollers 9 and Hare carried in the said guideways and bear on the lower rollers 8 and Ill respectively. I

The rollers 8 and Ill which may be made for example of metal dip into the colour compartments 4 and 5 respectively and are provided on their surfaces with a number of projecting points or protuberances ll which facilitate the picking up of the colourswhich are transferred to the rollers 9 and I l respectively.

As shown in Figures 4 and 4a these rollers 9 and H which may be made of hard wood are provided with peripheral ridges some of which may be discontinuous. The ridges on roller 9 are so disposed that they receive colour in increasing quantity towards the centre of the roller while the ridges of roller II are so disposed that they receive colour in increasing quantity towards the extremities of the roller.

The colours from the rollers 9 and I l are transferred to the colour feed roller l6 and become merged into each other. As will be seen from Figure 2 the colour feed roller I6 is supported by and between the rollers 9 and II and is held in guideways I! provided at each end of the casing I.

The colour feed roller 16 may be provided with a hard rubber or like surface upon which a relatively large number of circumferential grooves I8 are formed.

This colour feed roller l6 contacts with an adjustably mounted colour applying roller l9 having a soft felt-like surface 20 which in turn contacts with the surface to be coloured thus e ab s t e 2,118,719 the wall or across the wall, so the colour will merged colours from the feed roller to be deposited thereon.

The colour applying roller I9 is adjustably mounted by means of sliding brackets 2| which carry the bearings 22 for the said roller, the ad- Justment being effected by means of butterfly nuts 23.

The device is provided with roller 24 which keep the device a slight distance from the wall or other surface during the travel thereover by the colour applying roller IS.

A foot 25is provided to enable the device to rest in a substantially horizontal position when not in use.

At the back of the casing a spirit level '26 is provided to enable the operator to maintain the device in a horizontal position and thus ensure that the travel over the surface to be coloured is effected vertically.

It is to be understood that the invention is not limited to the use of two colours since by suitable adaptation three or more colours may be used and this will be provided for by additional sets of colour receiving rollers, these being ridged relatively to one another so as to obtain the effect ,above described that the contrasting stripes of colour shall be caused to merge one into the other.

In a modification the colour applying roller may be formed as an engraved surface either in relief or in intaglio so as to obtain a stencllled design effect on the stripes applied to the surface desired.

I claim:--

1. A device for applying colour to surfaces comprising a casing, colour reservoirs at the base of said casing, transfer rollers mounted in said casing and adapted to dip into each of the said colour reservoirs, ridged rollers mounted in the said casing and in peripheral contact with each of the said transfer rollers, the said ridged rollers being provided with a series of ridges so as to receive and apply colour over a length different from the adjacent ridged roller, a common colour feed roller mounted in said casing in peripheral contact with the said ridged rollers from which it receives colours by contact with the ridges thereof, and an adjustably mounted colour applying roller which rotates in contact with the said feed roller and with the surface to be coloured.

2. A device for applying colour to surfaces comprising a casing, two colour reservoirs at the base of said casing, transfer rollers mounted in the said casing over each colour reservoir, ridged rollers mounted in the said casing and in peripheral contact with each of the said transfer rollers, the said ridged rollers being provided with ridges so that the ridges of one roller are wider at the centre of the said roller and diminish towards the ends thereof, while the ridges of the other roller are wider at the ends thereof and diminish towards the centre, a common colour feed roller mounted in said casing in peripheral contact with the said ridged rollers from which it receives colour by contact with the ridges thereof, and an adjustably mounted colour applying roller which rotates in contact with the said feed roller and with the surface to be coloured.

3. A device as claimed in claim 1 the transfer rollers of which have a broken surface to facilitate transference of colour from the reservoirs to the ridged rollers.

4. A device as claimed in claim 2 the transfer rollers of which havea broken surface to facilitate transference of colour from the reservoirs to the ridged rollers.

5. A device as claimed in claim 1 in whichthe feed roller is mounted on brackets adjustably secured to the casing.

6. A device as claimed in claim 2 in which the feed roller is mounted on brackets addustably secured to the casing.

7. A device as claimed in claim 1 in which guide rollers are provided at the lowerpart of the casing which co-operate with the feed roller to facilitate movement thereof over the surface to be treated.

8. A device as claimed in claim 2 in which guide rollers are provided at the lower part of the casing which co-operate with the feed roller to facilitate movement thereof over-the surface to be treated.

9. A device as claimed in claim 1. wherein levelling means are provided on the casing.

10. A device as claimed in claim 2 wherein levelling means are provided on the casing.

SVERRE FRITHJOF 

